Canon Scan to Email not connecting to server

@murday 

I have been scanning from a canon MF642C printer to email using my comcast email account as the sending account. Configured per the xfinity guidance:

• 1. ​configure the management name/pin of printer
  2. ​login as management to the the web UI browser, http://printer-ip/​
  3. ​change the SMTP TX port to 587, find it at ​​System Settings​​ -> ​​Network Settings​​ -> ​​TCP/IP Settings​​ -> ​​Port Number Settings​
  4. ​Enter the info in E-Mails Settings ​​System Settings​​ -> ​​Network Settings​​ -> ​​E-Mail Setting​

  ​SMTP Server Addess: smtp.comcast.net​

  ​E-Mail Address: your@address​

  ​Check Use SMTP Auth​

  ​Enter your username: your@comcast.net​

  ​Check Set/Change Password​

  ​Password: Your password.​

I've tried every port configuration: 25, 465, 587

I've checked and rechecked the password is correct. I can't get the scanner to connect to the comcast server.

You said you have been scanning, so that tells me you've been successful in the past.  Have you recently changed your password?  If not, you may need to.  Are you a current customer?